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The Perfect Qubit: How Tunable Light Helps in the Quantum Quest

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The Perfect Qubit: How Tunable Light Helps in the Quantum Quest

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  • Author: Dr Elizabeth Illy
Physicists are still looking for the perfect quantum qubit: a two-level quantum system that can be precisely measured and controlled, while remaining unaffected by its environment. One of the most promising candidates are defect centers in solid-state materials, also known as colour centers, which have been found to emit a single photon per excitation event when excited by laser light of a particular frequency.

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